/Engine/Plugins/Media/PixelStreaming/Source/PixelStreaming/Public/PixelStreamingVideoInput.h
The input of the Pixel Streaming system. Frames enter the system when OnFrame is called. The input buffers might need to be converted/adapted to suit the selected video encoder. CreateAdaptProcess should create a PixelStreamingFrameAdapterProcess that does this work.
class FPixelStreamingVideoInput : public [IPixelCaptureCapturerSource](API\Plugins\PixelCapture\IPixelCaptureCapturerSource)
FOnFrameCapture...
OnFrameCaptured